Improvement in casting copper cylinders



1%. 32,169. I .PATENTED APR, 30, 1861-.

' P. ADAMS.

"CASTING GOPPER CYLINDERS.

7557 m away Unrrnn STATES- ParnNT GFFI E.

IMPROVEMENT in'oAs' rme COPPER CYLlNiDERS.

Specification forming part ofLei crs Patent No. 3?,l69, 41:\i'l 1.\; l'ii '30, 1 61- Zn (:ZZ whom it Iii-b1? concern:

Be it known that I, linnnnonn ADI-ins. of

Somerville, in the county of Middlesex and State of- Massachusetts, havcinvented certain new and useful Improvements in the .Artof Casting Copper Cylinders and Tubes. of which the follewingis afull, clear. andexact description, reference being had to'the accompanying drawings, making part of this specification, in which- Figure 1 is a plan of a mold for casting a tube or cylinder; Fig. 2, a vertical section of the sameon the line .rL-r of Fig. 1; Fig. 3, the funnel or mouth-piece oft-he mold detached; Fig. 4, aperspectiveflew of the top of the mold A and core 0, the mouth-piece E being removed to show' the brace c. a I

In casting copper cylinders, tubes, and similar articles in a vertical mold in which a core isused. .itis found in practice that from the peculiar natureof the metal and the manner in which it cools itiis very difficult to obtain a perfect casting, the finishedarticle being marred by blow-holes and imperfections. This I consider arises from the difficulty with which the fluidmetal, as it is poured in at the to'p of the mold, mixes with that which is partially crystallized in the mold, the metal which is poured in at top on one side of themold rising or floating up and cooling against the opposite side. To remedy this difi'iculty I devised a plan of rotating the mold, that the metal. might be poured uniformly around the tion of the mold. I I

That others skilled in the art may under stand and use my invention, I will proceed to describe the mannerin which I have carried out the same. i r I In the said drawings, A is the vertical mold, whichistands on a suitable base. I; is the coretune,which is perforated with small holes i, and around which is formed the core 0 of moldcrs sand. This core is supported on an adjustable blocki D, which fits in the mold and may be movcdiup or down to suit the length of cyl inder to be cast.

steadied and kept in place by a. thin metal brace, c, which encircles it, and rests against opposite sides of the mold. Afunnel or mouthpiece, E, tits on top of the mold, and'has its inner surface, I), beveled for the convenience ofpouringin thefluid metal.

In filling this mold according tomy improved plan the melted copper is poured in steady streams from two melting-potsene on each side of the moldat the same time. The-two streams of metal run down on the opposite sides ot'the mold and mingle together. sides of the casting rising equally fast and uniformly, the usual imperfections will not occur in it.

In some cases it is more convenient to pour from one melting-pot. In this case I make use of-the device shown in the drawings for dividing the stream. Attached to each side of the mouthpiece E is a projection, a, which rises to an edge, 5, and slopes offou each side unite on'the opposite side of the mouth-piece,

and would fall in a single stream down into the mold; but by using two pieces a each branch of the divided stream is kept separate, and so falls into the mold on the two opposite sides.

' As the melted copper would soon cut away the edge 5, I protect it with a piece of plumbago or other heatresisting substance, which is either made to 'cover the edge or is let into the iron casting of which the mouth-- piece is composed.

In some cases, as with cylinders of a con sidcrable diameter, more than two streams of metal may be poured into the mold from opposite sides.

What .i claim as my invention, and desire to secure by Letters Patent, is-- As an improvement in the art of casting copper cylinders and tubes, pouring the finid metal in two or more streams nto the mold on opposite sides, snbshmtially as described.

Witnesses: I ItIlE'lOll-N ADAMS.

(limos. L. G'LOYRR, EDMUND DIASSZXY.

The top end of the core is As the metal rises in the mold, the two'- 

